Contact-breaker for magneto-electric igniting apparatus.



Patented Jan. 10, 1911.

)NVENTQR, G us'mv ADQLFUNTERBERQ y (3' g {K w Attorne G. A. UNTERBERG.

APPLICATION FILED APR. 20, 1909.

'mr uoluus ran-Rs GONTAGT BREAKER FOB. MAGNETO ELECTRIC IGNITINGAPPARATUS.

WFFNESSES;

UNITED STATES PATENT OFFICE.

GUSTAV ADOLF UNTERBERG, OF DURLACH, GERMANY.

CONTACT-BREAKER FOR MAGNETO-ELECTRIC IGNITING APPARATUS.

To all whom it may concern:

Be it known that I, GUSTAV ADoLr UNTER- BERG, a citizen of the GermanEmpire, and resident of Durlach, Baden, German Empire, have inventedcertain new and useful Improvements in Contact-Breakers forMagneto-Electric Igniting Apparatus, of which the following is a full,clear, and exact de scription.

The present invention relates to contact breakers for magneto-electricigniting apparatuses for explosive power motors.

The invention relates more particularly to the particular arrangement ofthe breaker spring and the movable contact, which latter is not, asheretofore, mounted on the spring itself but on a separate lever adaptedto swing out on a fulcrum, as hereinafter particularly set forth.

In order to render the present specification easily intelligiblereference is had to the accompanying drawing in which similar letters ofreference denote similar parts throughout the several views.

Figure 1 is a sectional view of the device taken along the line A-A ofFig. 2, Fig. 2 is a cross section on the line BB of Fig. 1 and Fig. 3 isa vertical cross section taken along the line CC of Fig. 1.

The breaker may be connected to the igniting apparatus in any knownmanner, the latter which is known and forms no part of the presentinvention not being shown in the drawing. For the purposes of thepresent specification the breaker is assumed to be mounted on the end aof the armature shaft a of the magneto igniting device. The breakerspring, which exercises pressure in the directon of the axis (4,consists of two semicircular pieces I) b backwardly bent round at Z)(Fig. 3) and having their ends Z) clamped to the shaft (4 by means ofthe insulating disks 0 c. The lever c carrying the movable contact (Z ismounted in front of the springs 6 Z), the said lever being adapted toswing in the direction indicated by the arrow in Fig. 2, on the pin 9which is supported against the non-yielding arm f.

The device operates in the following man- Specification of LettersPatent.

Application filed April 20, 1909.

Patented Jan. 10, 1911. Serial No. 491,135.

ner:lVhen the breaker rotates, the lever e strikes the cam surface itwith its extended end 6, the said cam h pushing the movable contact (Zoff the stationary contact 2' and momentarily breaking the circuit. Assoon as the cam It has been passed the spring 6 5 again forces thecontacts (Z 2' together. By means of the hereinbefore described arrangement of the spring it is subjected to but very slight wear and tear andthus the life of the spring is prolonged. The pin 2' is mounted on thelever f and connected to one pole or terminal, but insulated from thepin 9 so that the circuit will be broken when the parts (Z and z' areseparated.

I claim as my invention 1. In a contact breaker for magneto electricigniting apparatuses, having a n0nyielding lever carrying a stationarycontact, a movable contact and means for supporting the same, thecombination of springs for normally holding the movable contact againstthe stationary one, consisting of two semicircular pieces having theirends bent round backwardly, a magneto shaft and two insulating disks toclamp the ends of the said pieces to the said magneto shaftsubstantially as described.

2. In a contact breaker for magneto electric igniting apparatuses havinga nonyielding arm supporting a stationary contact, the combination of ayielding lever having a movable contact at one end and having itsopposite end supported against the said nonyielding lever, a spring,consisting of two semi-circular pieces having their ends bentbackwardly, a magneto shaft and two insulating disks to clamp the saidends to the said magneto shaft, said spring serving to normally hold themovable contact against the stationary one and means for periodicallyraising the former from the latter.

In testimony whereof I aflix my signature in the presence of twowitnesses.

GUSTAV ADOLF UNTERBERG.

Witnesses CLN. BOETMANN, N. N. SHANK.

